Swivel joint



Patented Aug. 8, 1950 2,518,318

UNITED'; STATES PATENT; OFFICE v 2,518,318 v I y V JOINT Edgar L. Hinkson, Detroit, Mich; assignor to The I 'General Detroit Corporation, Detroit, Mich; a corporation of Michigan Application November 17, 1947, Serial No. 786,428

V 40mm. (o1. 285-973) -'The present invention relates to swivel joints, and more particularly to improved swivel joints for connecting high pressure fluid conduits.

' The principal objects ofthe invention are to the head 38 permits the coupling member 34 to befreely rotated relative to the body H) at all times." Thecoupling member 34 has a bore 46 extending axially therethrovgh and is provided at its outer provide an improved swivel joint which is simple 5 end with an externally threaded portion 42 adaptin design, economical oi eonstruction,-and relied for connection to a pipe or other source of high able and efficient in operation; and to provide pressure fluid. Externally of the body ill, and such an improved swivel joint peculiarly adapted adjacent the threaded portion 42 the shank porfor association with high pressure fluid conduits. tion 36 of the coupling 34 is formed to provide a Other and more detailed objects will become pair of opposed flats 43 for engagement by a con apparent from a consideration of the accompanyvolitional wrench or the like. The bore portions ing drawing, the following specification and the i4 and i6 of the body serve to house packings 4d appended claims. a and 43 respectively, the packing 44 in the portion In the drawings: "seating on an annular shoulder 48 on the body Figure 1 is a longitudinal sectional view-ore intermediate h portions l2 and H. The pack-j joint embodying the invention; ing 46 seats against an annular washer fall which Fig. 2 is anelevational view of the structure surrounds the shank '35 of the coupling member illustrated in Fig. 1 taken in the direction of the 34 and bears against an annular shoulder 52 arrow-Mind, 1 y l 7 i i formed on the body It intermediate theportlons Fig. 3 is a sectional view of the body of the I4 and 16. swivel jointillustrated in Fig. 1. i The packings 44 and 46 preferably have Referring to the drawing, the swivel joint feathered edges as indicated at 54 and 56, which comprises a body I!) having a cylindricalexterior' are forced against the shank 35 of the coupling and an axial bore extending therethrough,"an'd member 34 and the cooperating surfaces of the having a plurality of portions 12, I4, I6, l8 and 20 body portions l4 and I6 to form tight seals beof progressively increasing diameters varying tween the body I!) and the coupling member 34. from the portion I2 of smallest diameter at one Also, the packings 44 and 46 and the bore portions end of the body to the portion 20 of largest diaml4 and 16 are so proportioned that the shoulders eter at the other end of the body. The largest 52 and 4| prevent the crushing of the packings portion 20 is internally threaded and the adja- 3Q 44 and 46 by the washer 50 and the head 3 cent end of the body l0 defines an annular seat respectively. 22. A coupling member 24 having an externally While only one embodiment of the invention threaded shank portion 26 and a radially outhas been illustrated and described in detail, it wardly projecting flank 28 is threaded into the will be readily apparent to those skilled in the internally threaded portion 20 of the body [0 art that numerous modifications and changes until the flange 28 on the coupling member 24 may be made without departing from the spirit seats against t annular S 22 formed n the of the invention or from the scope of the appendbody member Ill. The coupling member 24 has ed daims, an axial bore 30 therethrough, the outer portion I claim; of which is provided with internal threads 32 for 1. A Swivel joint for high pressure fl id connection to a discharge pipe or coupling. The duits comprising a body member having an axial Peripheral portion of the flange 2a is hexagonany bore therethrough including a portion of reduced Shaped as illustrated in Fig 2 for engagement by diameter at one end, a coupling member extenda Conventional ing through and freely fitting said portion of re- A Second couplmg member 34 has a shaflnk duced diameter, said coupling member having an tion 35 which extends through the portlons annular radially outwardly extending flange disand F the body member and freely f posed within and loosely fitting said body memthe end portlon 2 smallest dlameter- Y ber, packing means disposed intermediate said inner end the 1 member 34 h an flange and said one end, a second coupling memtegrally formed disk-like head 38 which loosely her mounted on the other end of said body fits the body portion I8 and has a loose fit between her Said second coupling member and Said body the inner axial face 39 0f the coupling member 24 member having cooperating means limiting moveand an oppos d cooperating annular Shoulder ment of the former inwardly of the latter, said on the body I!) intermediate the portions I6 and body member having an axially presenting 1 1.. ID f the bore. The just described 1 0 fit 0f der cooperating with the inner axial face of said second couplin member to loosely confine said flange, and said coupling members communicating at their inner ends with the interior of said body member between said flange and said other end of said body member.

2. A swivel joint for high pressure fluid conduits comprising a body member having an axial bore therethrough including a, portion of reduced:

diameter at one end and an annular seat at its other end, a coupling member projecting through and freely fitting said portion of reduced diameter, said coupling member having an enlarged.

head disposed within and loosely fitting said body member, sealing means disposed intermediate said head and said one end, a second coupling member mounted on said body and including a flange portion engaging said seat to limit movement of said second coupling member inwardly of said body member, said body member having an axially presenting shoulder cooperating with the inner axial face of'said second coupling member to loosely confine said head.

3. A swivel joint for high pressure fluid conduits comprising a body member having an axial bore therethrough including a portion of reduced diameter at one end, a portion of enlarged diameter adjacent the other end and intermediate portions of intermediate diameters defining a shoulder on said body member, a coupling member adapted for connection to a fluid conduit and extending through said intermediate portion and said portion of reduced diameter and freely fitting the latter, said coupling member having an enlarged head loosely fitting said portion of enlarged diameter, packing means disposed in and individual to said intermediate portions, a washer disposed between said packing means and engaging said shoulder to prevent contact between and crushing of said packing means, said body having a shoulder between said intermediate portions and said portion of enlarged diameter adapted to engage said head to prevent movement of the latter to crush said packing means, and a second coupling member adapted for connection to a 4 fluid conduit and mounted on said body member at said other end, said second coupling member and said body having cooperating means limiting movement of the former inwardly of the latter, whereby said head is loosely confined between said second named shoulder and the inner axial face of said second coupling member.

- 4. A- swivel joint for high pressure fluid conduits comprising a body member having an axial bore therethrough including a plurality of portions of progressively increasing diameters from a portion .of smallest diameter at one end of said member to an internally threaded portion of largest diameter at the other end of said member and a plurality of shoulders intermediate adjacent pairs of said portions, said member having an annular seat at its other end, a coupling member adapted for connection to a fluid conduit and threadedly engaging said body member and having an annular portion engaging said seat, a second coupling member adapted for connection to a fluid conduit and having a disk-like head loosely fitting the one of said plurality of portions adjacent said threaded portionand a shank portion extending through and freely fitting said portion of smallest diameter, said head being loosely confined between one of said shoulders and the inner axial face of said first named coupling member, packing means disposed in and individual to a pair of bore portions intermediate said portion of smallest diameter and said one of said portions, and washer means mounted intermediat said packing means and engaging another of said shoulders to prevent contact and resulting crushing of said packing means.

EDGAR. L. HINKSON.

REFERENCES CITED The following references are of record in the file of this patent: V

UNITED STATES PATENTS Number 'Name 7 Date 2,356,351 Phillips Aug. 22, 1944 

